I came to chew bubblegun and kick butt, and I'm all out of butt." is a reference to the 1988 film They Live in which the main character, enters a bank with a pump-action shotgun and says "I have come here to chew bubblegum and kick ass, and I'm all out of bubblegum." It is also a reference to Duke Nukem with the quote "It's time to kick ass and chew bubblegum, and I'm all out of gum.